P0338

P0338-CRANKSHAFT POSITION (CKP) SENSOR VOLTAGE TOO HIGH





For complete wiring diagrams refer to Diagrams/Electrical.


- When Monitored:

With the key on.

- Set Condition:

Voltage detected at the CKP is above a calibrated value for a calibrated amount of time.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test


1. (K853) 5-VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE





Turn the ignition off.

Disconnect the ECM harness connector(s).

Disconnect the CKP sensor harness connector.

Check connectors - Clean/repair as necessary.

Measure voltage between the (K853) 5-volt supply circuit in the sensor harness connector and battery negative.

Is the voltage greater than 1 volt?

Yes

- Repair or replace the shorted wiring harness.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To2

2. ECM





Reconnect the ECM harness connectors.

Ignition on, engine not running.

Connect a jumper wire between the sensor (K853) 5-volt supply circuit and the sensor (K975) return in the sensor harness connector.

Did DTC P0337 set?

Yes

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition

No

- Replace the ECM.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test